[[def divide(num1, num2):
    if num2 != 0:
        return num1 / num2
        # print(num1 / num2)

    else:
        print('denominator can\'t be 0')
        return divide(int(input('first number:')),int(input('second number:')))
    # 1)function zamani None return mikone ke  az "return" stefade nakarde bashi.
    # 2)age seri aval behesh (4,0) bedi baed behesh (10,5) bedi, in 
    #funtion 2 bar call mishe, seri aval None ro barmigardune chon returni
    # vojud nadare,serie dovom adad ro return mikone .chon return faghat tuye
    # "if" hast, age ghesmate else ejra beshe, None reurn mishe   


print(divide(4, 0))
# divide(4, 0)
print('this is out of function')]]